Although there are some differences between humans and animals, the energy they can survive depends on the three major nutrients that are ingested from food, namely sugars, fats and proteins. But is it enough to say that only these three nutrients exist? In fact, if you rely solely on these three nutrients, animals cannot survive. The reason is that in vivo for the use of nutrients in the maintenance of life activities, the need for a variety of chemical reactions, in order to make this chemical reaction can be effectively carried out, but also a very small amount of special substances, that is, trace elements of participation, and these trace elements mainly include vitamins and minerals.